I created this call reminder because I always forgot to re call the second time at the right time. Which was especially painful when I missed the opening hours again and had to wait another day or weekend... again.
The app usage is quite straight forward.
* Start page with instant access to the last called number.
* Set the time in days, hours and minutes
* Create reminders for older numbers with the call history
If you like the app, consider supporting its development in buying the Donate version.